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Template synthesis and structure of mono- and trisubstituted ribbed-functionalized iron(II) clathrochelates |
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| Authors: | Yan Z Voloshin Oleg A Varzatskii Ivan I Vorontsov Ekaterina G Lebed |
| Institution: | a Karpov Institute of Physical Chemistry, 10 Vorontsovo Pole, 105064 Moscow, Russia b Vernadskil Institute of General and Inorganic Chemistry, Kiev-142, 03680, Ukraine c Nesmeyanov Institute of Organoelement Compounds, 119991, Moscow, Russia |
| Abstract: | The template condensation of three methylchloroglyoximate molecules with phenylboronic acid and with BF3 · O(C2H5)2 on an iron(II) ion afforded reactive trichloride phenylboron- and fluoroboron-capped precursors, respectively. The monochloride FeBd2(CH3ClGm)(BF)2 precursor (where Bd2− and CH3ClGm2− are α-benzyldioxime and methylchloroglyoxime dianions) was synthesized by condensation of macrocyclic iron(II) α-benzyldioximate FeBd2(BF2)2(CH3CN)2 with CH3ClGmH2. Mono- and trifunctionalized amine, alkylsulfide, and arylsulfide clathrochelate iron(II) tris-dioximates were prepared starting from these precursors by nucleophilic substitution reactions. The complexes obtained were characterized using elemental analysis, PD mass, IR, UV-Vis, 1H, 13C NMR, and 57Fe Mössbauer spectra, and X-ray crystallography. An encapsulated low-spin iron(II) ion was found to have distorted trigonal-prismatic coordination N6-environment in all clathrochelates synthesized. |
| Keywords: | Iron complexes Clathrochelates Macrocyclic compounds |
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